Guestbook - How is visitor information used

For the Quick Share Guestbook in Rise, how is the first name, last name and email data used by Articulate? What parts of the privacy policy and terms and conditions are applicable to the use of Guestbook data? Is there an online resource that explains this simply? We have external entities that will be accessing our Quick Share course and would like to be able to explain the use and allay any fears.